发表机构
University of Fribourg; Université Côte d’Azur; CNRS, Institut de Physique de Nice – INPHYNI; Optoelectronics Research Centre, University of Southampton（弗里堡大学; 蔚蓝海岸大学; 法国国家科学研究中心，尼斯物理研究所-INPHYNI; 南安普顿大学光电研究中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究制备三维无序硅网络，开发偏振分辨透射光谱，证实其存在深光子赝带隙，为观测光的安德森局域等无序诱导局域现象提供实验基础。
AI 中文摘要
光子带隙不仅能在晶体电介质材料中形成，也能在非晶结构中出现。自均匀非晶螺旋网络被提出作为有前景的无序光子架构。受数值研究启发，我们结合直接激光写入光刻与先进材料加工技术，用高折射率硅制备这些结构。中红外波长的光谱测量显示出明显的透射极小值。为研究非晶结构中光子带隙的形成，我们开发了偏振分辨透射光谱，可区分弹道与多重散射贡献，从而直接识别潜在的传输机制。我们观测到漫透射的强抑制，为与光子态密度大幅降低相关的常规漫传输崩溃提供了直接实验证据。结合大规模数值模拟，我们的结果证实了非晶三维电介质材料中存在深光子赝带隙，并为观测无序诱导的局域现象（包括光的安德森局域）开辟了新机遇。
英文摘要
Photonic bandgaps can open not only in crystalline dielectric materials but also in amorphous structures. Self-uniform amorphous gyroid networks have been proposed as promising disordered photonic architectures. Motivated by numerical studies, we combine direct laser-writing lithography with advanced materials processing to fabricate these structures from high-refractive-index silicon. Spectroscopic measurements at mid-infrared wavelengths reveal pronounced transmission minima. To investigate the formation of photonic band gaps in amorphous structures, we develop polarization-resolved transmission spectroscopy that separates ballistic and multiply scattered contributions, enabling direct identification of the underlying transport regimes. We observe a strong suppression of diffuse transmission, providing direct experimental evidence for a breakdown of conventional diffuse transport associated with a strongly reduced photonic density of states. Together with large-scale numerical simulations, our results establish the presence of a deep photonic pseudogap in an amorphous three-dimensional dielectric material and open new opportunities for observing disorder-induced localization phenomena, including Anderson localization of light.
